Alternator Brush: Testing and Inspection

Brush





If brushes are worn to, or beyond limit, replace them.

Standard: 0.85 in (21.5 mm)
Minimum: 0.32 in (8.0 mm)

Brush spring
1. Measure force of brush spring with a spring pressure gauge.





2. Replace the spring if necessary.

Standard force: 0.71 0.93 lb-ft (3.1 - 4.1 N.m, 0.32 - 0.42 kg-m)

Minimum: 0.36 - 0.52 lb-ft (1.60 - 2.4 N.m, 0.1 6 - 0.24 kg-m)

Read spring pressure with brush tip projecting 0.08 in (2 mm).